水灰比对外掺氧化镁的介质压蒸膨胀率的影响  

Influence of water cement ratio on pressure-braise expansion rate of medium with magnesium oxide

作　　者：李维维[1] 陈昌礼[1] 方坤河[1,2] 刘小萤[1] 赵振华[1] 

机构地区：[1]贵州师范大学材料与建筑工程学院,贵州贵阳550059 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《混凝土》2012年第4期55-57,共3页Concrete

基　　金：国家自然科学基金项目(50969002)

摘　　要：为了探索混凝土中外掺氧化镁安定掺量的新方法,开展了水灰比对外掺氧化镁的介质(水泥净浆、砂浆、一级配混凝土、二级配混凝土)压蒸膨胀率影响的试验研究。结果表明:水灰比对外掺氧化镁的介质压蒸膨胀率有重要影响;试体的压蒸膨胀率随着水灰比的增大而减小;压蒸膨胀率随着水泥净浆、一级配混凝土、水泥砂浆、二级配混凝土的顺序依次递减。For searching the new approach on balanced content of magnesium oxide in concrete,the influence of water cement ratio on pressure-braise expansion rate of medium（cement paste,mortar,one grading and two grading concrete） with magnesium oxide is tested.The results show that the influence of water cement ratio on pressure-braise expansion rate of medium with magnesium oxide is very important.The pressure-braise expansion rate is reduced with water cement ratio increasing.The pressure-braise expansion rate is increasingly decreasing with order of cement paste,one grading,mortar,two grading concrete.

关 键 词：水工混凝土 压蒸膨胀率 压蒸试验 水灰比 

分 类 号：TU528.062[建筑科学—建筑技术科学]